JoinMulticastIPv6 joins the multicast group address given by gaddr. laddr specifies which network interface to use when joining the group.
(c *net.IPConn, gaddr, laddr net.IP)
| 203 | // JoinMulticastIPv6 joins the multicast group address given by gaddr. laddr specifies which |
| 204 | // network interface to use when joining the group. |
| 205 | func JoinMulticastIPv6(c *net.IPConn, gaddr, laddr net.IP) error { |
| 206 | f, err := c.File() |
| 207 | if err != nil { |
| 208 | return err |
| 209 | } |
| 210 | defer f.Close() |
| 211 | |
| 212 | mreq := &syscall.IPv6Mreq{} |
| 213 | copy(mreq.Multiaddr[:], gaddr.To16()) |
| 214 | iface, err := findInterface(laddr) |
| 215 | if err != nil { |
| 216 | return err |
| 217 | } |
| 218 | mreq.Interface = uint32(iface.Index) |
| 219 | |
| 220 | err = syscall.SetsockoptIPv6Mreq(int(f.Fd()), syscall.IPPROTO_IPV6, syscall.IPV6_JOIN_GROUP, mreq) |
| 221 | if err != nil { |
| 222 | return err |
| 223 | } |
| 224 | return nil |
| 225 | } |
| 226 | |
| 227 | func findInterface(laddr net.IP) (*net.Interface, error) { |
| 228 | ifaces, err := net.Interfaces() |
no test coverage detected